如图所示,在四棱锥中
,
,
,
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c72921fecf4ff29018f3bebaa01ff7b.png)
![](https://img.xkw.com/dksih/QBM/2022/5/13/2978577357905920/2981276207833088/STEM/937233d3-e547-43c4-b175-f53a39e70611.png?resizew=233)
(1)求证:平面
平面
;
(2)已知点
是线段
上的动点(不与点
、
重合),若使二面角
的大小为
,试确定点
的位置.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8ba2021caf4381dad4f73474912a8d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64e28b6a0398d826bfc7b45fc2b06d46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5ea309886e947ea7cb4b81716206fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c72921fecf4ff29018f3bebaa01ff7b.png)
![](https://img.xkw.com/dksih/QBM/2022/5/13/2978577357905920/2981276207833088/STEM/937233d3-e547-43c4-b175-f53a39e70611.png?resizew=233)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16b77a5c3865855fbb3d24f9522ced8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bf126ef95080e8caa2b862122ab5d05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
21-22高二下·江苏徐州·期中 查看更多[4]
江苏省徐州市铜山区2021-2022学年高二下学期期中数学试题广东省深圳市南头中学2022-2023学年高二上学期期中模拟数学试题(已下线)专题1.11 空间角的向量求法大题专项训练(30道)-2022-2023学年高二数学举一反三系列(人教A版2019选择性必修第一册)福建省泉州科技中学2023-2024学年高二上学期期中考试数学试题
更新时间:2022-05-17 12:04:52
|
相似题推荐
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐1】如图甲,在平面四边形
中,已知
,
,
,
,现将四边形
沿
折起,使平面
平面
(如图乙),设点E、F分别为棱
、
的中点.
![](https://img.xkw.com/dksih/QBM/2020/7/19/2509473982504960/2510531238002688/STEM/8fcf9b69f79b4e77baf6ba55dad9f833.png?resizew=279)
(I)求证:
平面
;
(II)设
,求三棱锥
夹在平面
与平面
间的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d641dc3f23401265f390e3d876a4079c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1c4963a8dd574692fa1a32272a1d4e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f44a7b88be6c68973512f05614a7e12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f5fc4ad65b723b6a8da4c8dac154e6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6dc837ae85207789b94d109c5c2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4739afd7311501e948aa4e1e5c1cb17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/2020/7/19/2509473982504960/2510531238002688/STEM/8fcf9b69f79b4e77baf6ba55dad9f833.png?resizew=279)
(I)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/689c065652544780be8b33ae92cbb6d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(II)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cff9776147fc555da105a5adabfa4347.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,直四棱柱
中,底面是边长为4的菱形,
,
,
分别是
,
上的点,且
,
,
为
的中点,点
为
上一点,且
.
![](https://img.xkw.com/dksih/QBM/2021/5/18/2723895559733248/2723952362790912/STEM/349ce7e82bd8406cbcccedbcbbc82eb2.png?resizew=220)
(1)若
,求证:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c016262f7c32817de8cb270fc9244f5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d64d857c9e44dc69b19e1587e2aa677.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50f85543243052612fb75694d6978bb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b6f3757785576de3cad8358ccb7a379.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee647fa1347c36a1d14e80a278b811b.png)
![](https://img.xkw.com/dksih/QBM/2021/5/18/2723895559733248/2723952362790912/STEM/349ce7e82bd8406cbcccedbcbbc82eb2.png?resizew=220)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/191d9381c4f252fbb5553ba72462d0aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa3c61d6c19e187b4b824b6f5610cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15b63176f43bc7a0654d0f6f45e7429.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36f33997d5b4a0d9a3feafc1a075bc56.png)
您最近一年使用:0次
【推荐1】如图所示,直三棱柱
的底面是边长为
的正三角形,
,
分别是
,
的中点.
![](https://img.xkw.com/dksih/QBM/2021/4/8/2695269077909504/2762700312928256/STEM/8c4b73100fb742b8b41884e53d15afdb.png?resizew=231)
(I)求证:平面
平面
.
(II)若二面角
为
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/2021/4/8/2695269077909504/2762700312928256/STEM/8c4b73100fb742b8b41884e53d15afdb.png?resizew=231)
(I)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6501f1c913a4ef64957a2f01ab5baa15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f96c673a2381f118ea2d3efc0bca1f3.png)
(II)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f726924c16c769a012d7a111f81e44e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/062e008fb2224a797b360a10e0c4e688.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐2】如图,三棱柱
-
的底面是边长为2的等边三角形,
底面
,点
分别是棱
,
上的点,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a22b341dd22fc35327700b6b559b03a.png)
![](https://img.xkw.com/dksih/QBM/2017/2/16/1625395344441344/1634789285445632/STEM/8f777c2afd0b448cbb29d0dacdd60781.png?resizew=180)
(Ⅰ)证明:平面
平面
;
(II)若
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a22b341dd22fc35327700b6b559b03a.png)
![](https://img.xkw.com/dksih/QBM/2017/2/16/1625395344441344/1634789285445632/STEM/8f777c2afd0b448cbb29d0dacdd60781.png?resizew=180)
(Ⅰ)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6501f1c913a4ef64957a2f01ab5baa15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(II)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图1,在
中,
,
,
,
,
分别是
,
上的点,且
,
,将
沿
折起到
的位置,使
,如图2.
![](https://img.xkw.com/dksih/QBM/2010/6/18/1569762728665088/1569762733481984/STEM/e5c09390afd24c50a5ed56d63a5207ae.png?resizew=499)
(1)求证:
平面
;
(2)线段
上是否存在一点
,使得平面
与平面
成
的角?若存在,求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa8cee7d2463f6f7d352e8b65f47cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95a078495ba47076ccaa28b46f765d80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a19338598965bb3856cdd0236bbf694.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f460edcced5597615113c0fdc95b1dfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f07107087ce4abdfa5fc68fe6fb62f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2fef4031c10abc18c8747af6b9a8a.png)
![](https://img.xkw.com/dksih/QBM/2010/6/18/1569762728665088/1569762733481984/STEM/e5c09390afd24c50a5ed56d63a5207ae.png?resizew=499)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26d8a9d64ad3c8cba28840b41ed7837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6e96872af0f0b341835576c407e364.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923189afc198d153c79059a827f63c87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/273905b509971fcc457f17f5d0b19b40.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】已知五边形
是平面图形(如图1),四边形
是矩形,
,
.现在沿
折叠
,使得
,得到四棱锥
(如图2).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/5b2f5fae-21d7-4be5-83c9-3d532efbbe30.png?resizew=261)
(1)求证:
平面
;
(2)若二面角
的余弦值为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1e3a43d0fa18f6c0888ba804d5b329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62974d34de3a12418d6b700420afd1b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0453cfd7e92bf7746a88280b9e7b580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81f17680a23635f823b7dc446e4f3b0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/5b2f5fae-21d7-4be5-83c9-3d532efbbe30.png?resizew=261)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b33b7213d99a817bff19bcf740a0697c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/459c84c9addfbd1cdd0a877ba7c584e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2465ee1fec12351943f15055dfd6ec73.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐3】如图,在四棱锥
中,底面
是直角梯形,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/22/b140676d-2c69-4654-975e-b44d2af3198f.png?resizew=154)
(1)证明:
平面
;
(2)已知
,
,
,平面
底面
,若平面
与平面
的夹角的余弦值为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e839ac941e8bf536ff35a12e56c7a400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0b2768d41c12b2a8f4d1b92f50d0b96.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/22/b140676d-2c69-4654-975e-b44d2af3198f.png?resizew=154)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b6053e396df2cd152e1329fce766d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b25c7ffb5540e9527451e19e477aafd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feedf3c1dee6e7befebf368c092ccd0c.png)
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